<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>02_项目排布</title>
    <style>
        .box {
            background-color: lightblue;
            display: flex;
            justify-content: flex-start; /*主轴起点对其*/
            justify-content: flex-end; /*主轴终点对齐*/
            justify-content: center; /*主轴居中对齐*/
            justify-content: space-around; /*主轴环绕对齐：每个元素左右两个间距都是a*/
            justify-content: space-between; /*主轴两端对齐：首尾元素贴边，剩余空间均分*/
            justify-content: space-evenly; /*主轴公平对齐：所有间隙等分*/
            /*交叉轴：永远垂直于主轴的轴，此属性控制元素在交叉轴上的排布方式*/
            align-items: flex-start;/*交叉轴起点对齐*/
            align-items: flex-end;/*交叉轴终点对齐*/
            align-items: center;/*交叉轴居中对齐*/
        }

        .item {
            width: 100px;
            height: 100px;
            border: 2px solid #f00;
            background-color: pink;
        }
    </style>
</head>
<body>
<div class="box">
    <div class="item">1</div>
    <div class="item">2</div>
    <div class="item">3</div>
    <div class="item">4</div>
    <div class="item">5</div>
</div>
</body>
</html>